1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
KonstantinChe [14]
3 years ago
14

after a certain pesticide compound is applied to crops its decomposition is a first order reaction with a half life of 56 days.

what is the rate constan for the decomposition reacion
Chemistry
1 answer:
antoniya [11.8K]3 years ago
4 0

Answer:

Rate constant = 0.01238 days⁻¹

Explanation:

The first order reaction has as general equation:

Ln[A] = -kt + Ln[A]₀

<em>Where [A] is concentration of the reactant after time t,</em>

<em>k is rate constant</em>

<em>And [A]₀ the initial concentration of the reactant</em>

<em />

The half-life is the time required to reach the half of the initial concentration. If [A]₀ = 1; [A] = 1/2

Replacing:

Ln[1/2] = -kt + Ln[1]

-0.693 = -k*56days

0.01238days⁻¹ = k

<h3>Rate constant = 0.01238 days⁻¹</h3>

<em />

You might be interested in
Two samples of matter differ in temperature by 20°C. What is the difference in temperature of these two samples using the Kelvin
anyanavicka [17]

Answer:

The difference is 293.15 Kelvin.

Explanation:

Given data:

Temperature difference of matter = 20°C

Temperature difference of matter in kelvin = ?

Solution;

Formula:

0°C +273.15

now we will put the values instead of 0.

20°C + 273.15 = 293.15 K

Thus, the temperature difference between two sample is 293.15 K.

5 0
3 years ago
What is the source of energy used to react chlorine with methane?
Papessa [141]
Ultraviolet light is the correct answer
8 0
3 years ago
Read 2 more answers
The arrows below represent the velocities of two vehicles. Which claim explains why the velocity of each vehicle is a vector qua
ollegr [7]

Answer:

It has direction and size.

Explanation:

All physical quantities are generally grouped into two;

i) Vector quantities

ii) Scalar quantities

Vector quantities are those quantities that has both magnitude (size) and direction.

Scalar quantities are those quantities that has magnitude (size) and no direction.

Velocity is a vector quantity because it has direction and size.

4 0
3 years ago
Which group would Ns2np2 go into
FrozenT [24]

Answer:

The group 15 elements: the pnicogens

Explanation:

The group 15 elements, nitrogen, phosphorus, arsenic, antimony and bismuth, all have the general valence shell electronic configuration ns2np3. They can all exist in the +3 or +5 oxidation state, with the +3 state increasing in stability as we move vertically down the group.

3 0
4 years ago
Read 2 more answers
Is the bond C=O polar or non polar
rewona [7]

Answer:

Non Polar

Explanation:

Non Polar molecule because of its linear symmetric shape

6 0
3 years ago
Other questions:
  • If an element has an atomic number of 11 and a mass number of 23, how many protons, neutrons, and electrons does it have
    14·1 answer
  • How does boyle's law relate to breathing?
    6·1 answer
  • nickel(ii) carbonate + hydrobromic acid = nickel(ii) bromide + carbonic acid + bromine gas how do you balance this equation
    7·1 answer
  • Aspirin (acetylsalicylic acid, C9H8O4) is a weak monoprotic acid. To determine its acid-dissociation constant, a student dissolv
    5·1 answer
  • Find the pH and the pOH of the solution
    7·1 answer
  • In which of the following ionic compounds is the force of attraction between cation and anion the weakest?
    7·2 answers
  • Two mice have different parents. They both have the same protein for whisker thickness in their cells.
    10·1 answer
  • Diameter 28cm,pie22/7find the circumference​
    11·1 answer
  • The pH of solution A is 7 and the pH of solution B is 5. Solution A has ____ times ______ hydrogen ion concentration compared to
    8·1 answer
  • A sample of gas occupies a volume of 72.0 mL . As it expands, it does 141.2 J of work on its surroundings at a constant pressure
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!